A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 53° above the horizontal. The weight of the ladder is 30 pounds. A 75-lb boy climbs 6.0-ft up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor?
a. 43 lb
b. 34 lb
c. 38 lb
d. 47 lb
e. 24 lb
B
You might also like to view...
At what frequency will a 50.0-mH inductor have a reactance XL = 700 ??
a. 352 Hz b. 777 Hz c. 1.25 kHz d. 2.23 kHz e. 14 kHz
If you filter sea water to remove all of the particles you would be left with a clear
A) homogeneous mixture called a solution. B) homogeneous mixture called a suspension. C) heterogeneous mixture called a solution. D) heterogeneous mixture called a suspension. E) pure liquid.
A 39-kg girl standing at rest on slippery (frictionless) ice catches a 1-g ball moving at 10 m/s. Just afterward, the girl is
A) moving at 0.5 m/s. B) at rest. C) moving at 2 m/s. D) moving at 4 m/s. E) moving at 0.25 m/s.
The web's ______ advantage allows for data and resource sharing that enables communication with a website.
A. currency B. connectivity C. interactivity D. delivery